Assuming the Orbi isn't doing 802.1Q, and you only want VLAN4 on Port 5. Looking at your last two screenshots, you want: - Port 4, VLAN1 untagged, VLAN4 tagged, because the port this is coming over on from the firewall, which should have 1 untagged, 4 tagged. - Port 5, VLAN4 untagged, and only that VLAN allowed on the port (currently, you have 1 untagged on that port, 4 tagged).
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